Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b1e26c1b06592a…

MALICIOUS

PDF

65.4 KB Created: 2020-12-21 20:21:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4c25889038eeac1f8ce6ee7f74b0eca9 SHA-1: 8b532c2fdf80a802ec7951da08169ea546ac8d8f SHA-256: e9b1e26c1b06592af3c5df0e4d7ce06959a479814ba571368635b59852cac4a8
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?utm_term=karyotyping+activity+answers In PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/jekusekusuwa.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/83cc92aa1a826.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/4f622.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/b1536fcbe01b0.pdfIn PDF document text
    • https://rafulosuzeme.weebly.com/uploads/1/3/4/2/134234553/nejaviwe_guwijowejefukik_kapawunas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6953b736-9d64-414a-97f0-2a925538017f/pirikamevifovanabot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb72034-af9a-4243-abbb-c248ac4b793d/probability_problem_and_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5e30c0-3f79-4a00-8712-2bf0ce71e3bc/8442076983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdcfa9d-cf96-46ab-8151-7c6c7df2a70e/dell_990_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13415954-3578-4908-9068-51fd8db870f2/seal_a_meal_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e043586c-d57f-4ca4-a8b3-a5aebd27903a/nimiliwosonoridafuwuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cbe40a-ad99-419b-9170-523e7889adf5/forte_beauty_and_the_beast.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56d932cf09257bd8a04eb/t/5fc8c6d3d17d55300fb60372/1606993619805/kalituwapikarejasado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52ba98ef7301f8b2cc778/t/5fcb02d264036b61438593d7/1607140050388/jekivunedaferib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcea2efb44223045ec8676c/t/5fd172df8ba64b78df4ab283/1607561955081/pet_doctor_rockwall_veterinary_hospital.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc115497acac6192ae753af/1606489417753/seesaw_molecular_geometry.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C3 5292 bytes
SHA-256: fb4b1980e6193ec26894282a07fba719498e4ebcefe1ba7e3026729822f450f9
font_01_sfnt_off0000d4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 10400 bytes
SHA-256: bd43513921c66fb91ca5b39ecd8c0110c3acbbf71b3999c25ce55ca9e0c0f39d

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